Mystic Falls is divided between two vampire clans. Rippers and The Originals. Elena is part of "Originals". She is Nicklaus Michelson's half sister. Damon is her mate who belongs to "Rippers". Their clans had a feud for centuries. Damon falls madly in love with her,unaware of her reality,after Elena accidentally crosses boundary. Hell break lose when truth comes out! Now it's war!